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Where to legally read the code behind computing history: Netscape 1998, early Unix via TUHS, museum releases like MacPaint, and id's GPL drops.
A practical checklist for verifying tech history claims before repeating them: earliest sources, denials, primary documents, and citogenesis traps.
Move from a secondhand claim to a verified fact using SEC filings, court opinions via RECAP, Usenet archives, and contemporaneous announcements.
Use Google Patents, Espacenet, and USPTO records — filing dates, prior art, assignments, litigation — to trace who actually built what first.
Plan around live demos like CHM's IBM 1401 and Bletchley's Colossus rebuild, mine oral history archives, and use collection databases remotely.
Find dated captures of any URL, compare page versions over time, query the CDX API, and cite Wayback Machine snapshots as real primary sources.